Should you want to try out the diopter, this will help considerable:
http://theswissriflesdotcommessageboard.yuku.com/topic/3674#.V2f8qvkrKM8
If you bought it from a Swiss shooter, expect it to have been sighted in for 300m.
It was released from inventory (sold to the soldier) in 1953
FWIW concerning price, if the bore is in great shape (7.51-7.53mm), a rifle in that condition is now going to cost at about $800, and the sights $400. Currently the Americans and Germans are paying top dollar on surplus guns and the cheap ones are no longer available.